It'll Be Like Putty In Your Hands It's called Thinking PuttyÂ® because while you do whatever you want with it, your brain relaxes and opens up to all kinds of creative thinking. Need it? Yes. And you can also knead it. Or bounce it, bend it, tear it, stretch it, snap it, pop it. And it's magnetic. You get 3.2 oz of dark green putty with iron filings infused in it, plus a 1/2" cubed rare earth magnet. Comes in a 4" dia x 1-3/8" tin.